X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/d0b5b8bcb412f9f169f2320623bd516afb34413b..64370885cca3a37ee1f4a9e96673aca7ba5daae4:/IkiWiki/Wrapper.pm
diff --git a/IkiWiki/Wrapper.pm b/IkiWiki/Wrapper.pm
index 4fe2d8111..06be36dfc 100644
--- a/IkiWiki/Wrapper.pm
+++ b/IkiWiki/Wrapper.pm
@@ -49,7 +49,7 @@ sub gen_wrapper () {
push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE
HTTP_COOKIE REMOTE_USER HTTPS REDIRECT_STATUS
- HTTP_HOST SERVER_PORT HTTPS
+ HTTP_HOST SERVER_PORT HTTPS HTTP_ACCEPT
REDIRECT_URL} if $config{cgi};
my $envsave="";
foreach my $var (@envsave) {
@@ -93,12 +93,53 @@ EOF
# memory, a pile up of processes could cause thrashing
# otherwise. The fd of the lock is stored in
# IKIWIKI_CGILOCK_FD so unlockwiki can close it.
- $pre_exec=<<"EOF";
+ #
+ # A lot of cgi wrapper processes can potentially build
+ # up and clog an otherwise unloaded web server. To
+ # partially avoid this, when a GET comes in and the lock
+ # is already held, rather than blocking a html page is
+ # constructed that retries. This is enabled by setting
+ # cgi_overload_delay.
+ if (defined $config{cgi_overload_delay} &&
+ $config{cgi_overload_delay} =~/^[0-9]+/) {
+ my $i=int($config{cgi_overload_delay});
+ $pre_exec.="#define CGI_OVERLOAD_DELAY $i\n"
+ if $i > 0;
+ my $msg=gettext("Please wait");
+ $msg=~s/"/\\"/g;
+ $pre_exec.='#define CGI_PLEASE_WAIT_TITLE "'.$msg."\"\n";
+ if (defined $config{cgi_overload_message} && length $config{cgi_overload_message}) {
+ $msg=$config{cgi_overload_message};
+ $msg=~s/"/\\"/g;
+ }
+ $pre_exec.='#define CGI_PLEASE_WAIT_BODY "'.$msg."\"\n";
+ }
+ $pre_exec.=<<"EOF";
lockfd=open("$config{wikistatedir}/cgilock", O_CREAT | O_RDWR, 0666);
- if (lockfd != -1 && flock(lockfd, LOCK_EX) == 0) {
- char *fd_s=malloc(8);
- sprintf(fd_s, "%i", lockfd);
- setenv("IKIWIKI_CGILOCK_FD", fd_s, 1);
+ if (lockfd != -1) {
+#ifdef CGI_OVERLOAD_DELAY
+ char *request_method = getenv("REQUEST_METHOD");
+ if (request_method && strcmp(request_method, "GET") == 0) {
+ if (lockf(lockfd, F_TLOCK, 0) == 0) {
+ set_cgilock_fd(lockfd);
+ }
+ else {
+ printf("Content-Type: text/html\\nRefresh: %i; URL=%s\\n\\n%s%s
",
+ CGI_OVERLOAD_DELAY,
+ getenv("REQUEST_URI"),
+ CGI_PLEASE_WAIT_TITLE,
+ CGI_PLEASE_WAIT_BODY);
+ exit(0);
+ }
+ }
+ else if (lockf(lockfd, F_LOCK, 0) == 0) {
+ set_cgilock_fd(lockfd);
+ }
+#else
+ if (lockf(lockfd, F_LOCK, 0) == 0) {
+ set_cgilock_fd(lockfd);
+ }
+#endif
}
EOF
}
@@ -140,6 +181,12 @@ void addenv(char *var, char *val) {
newenviron[i++]=s;
}
+set_cgilock_fd (int lockfd) {
+ char *fd_s=malloc(8);
+ sprintf(fd_s, "%i", lockfd);
+ setenv("IKIWIKI_CGILOCK_FD", fd_s, 1);
+}
+
int main (int argc, char **argv) {
int lockfd=-1;
char *s;
@@ -214,7 +261,7 @@ $set_background_command
EOF
my @cc=exists $ENV{CC} ? possibly_foolish_untaint($ENV{CC}) : 'cc';
- push @cc, possibly_foolish_untaint($ENV{CFLAGS}) if exists $ENV{CFLAGS};
+ push @cc, split(' ', possibly_foolish_untaint($ENV{CFLAGS})) if exists $ENV{CFLAGS};
if (system(@cc, "$wrapper.c", "-o", "$wrapper.new") != 0) {
#translators: The parameter is a C filename.
error(sprintf(gettext("failed to compile %s"), "$wrapper.c"));